Anon, from OLEO PAINTERS SUED in The Stars and Stripes, July 19, 1918—

Over-artistic oleomargarine producers have been sued by the [US] Government for coloring oleo in lifelike imitation of the best creamery butter.

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Anon, MORE JOY TAKEN OUT OF LIFE: THERE WILL BE NO KICK LEFT IN PATENT MEDICINES JULY 1 in Rock Island Argus (Rock Island IL), May 26, 1919, p. 2—

Another function of the laboratory [newly established at the Bureau of Internal Revenue] is to protect the unknowing housewife from the sale of adulterated butter…

On oleomargarine camouflaged to resemble butter, there is a tax of 10 cents a pound, and on uncolored oleomargarine a tax of a quarter of a cent a pound, substantial evidence of the government’s purpose to see that the public gets what it pays for. Hotel proprietors or boarding house keepers who color oleomargarine and serve it to their guests are subject to the same penalties of fine and imprisonment as are visited on the manufacturer and retailer. “Butter is butter and oleo is oleo, and never the twain shall be confused,” is the maxim of the government.